US10625229B2 - Device for preparing nano-carbon urea - Google Patents

Device for preparing nano-carbon urea Download PDF

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Publication number
US10625229B2
US10625229B2 US16/088,812 US201716088812A US10625229B2 US 10625229 B2 US10625229 B2 US 10625229B2 US 201716088812 A US201716088812 A US 201716088812A US 10625229 B2 US10625229 B2 US 10625229B2
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Prior art keywords
urea
nano
carbon
spray
granulation tower
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US16/088,812
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US20190336928A1 (en
Inventor
Wenying Xing
Ligang Zuo
Lele Zuo
Kaisheng Li
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BEIJING NANO HI-TECH MATERIAL Co Ltd
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BEIJING NANO HI-TECH MATERIAL Co Ltd
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Assigned to BEIJING NANO HI-TECH MATERIAL CO., LTD. reassignment BEIJING NANO HI-TECH MATERIAL CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LI, KAISHENG, XING, Wenying, ZUO, Lele, ZUO, Ligang
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2/00—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic
    • B01J2/02—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops
    • B01J2/04—Processes or devices for granulating materials, e.g. fertilisers in general; Rendering particulate materials free flowing in general, e.g. making them hydrophobic by dividing the liquid material into drops, e.g. by spraying, and solidifying the drops in a gaseous medium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D1/00—Evaporating
    • B01D1/16—Evaporating by spraying
    • B01D1/18—Evaporating by spraying to obtain dry solids
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05C—NITROGENOUS FERTILISERS
    • C05C9/00—Fertilisers containing urea or urea compounds
    • C05C9/005—Post-treatment
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites

Definitions

  • the present disclosure relates to a device for preparing nano-carbon urea.
  • Urea yield in China is more than 60 percent of the yield of total fertilizer, during the industrialization of urea production, the country invested a lot of energy and money to produce fertilizer, however, due to the easy decomposition of urea into soil, the nitrogen utilization rate was only 35%, this means energy waste and inefficiency, at the same time, it also brings serious environmental pressure.
  • the utility model uses nano-carbon sol as urea synergist to add into urea during the process of urea preparation to improve the utilization rate of fertilizer.
  • the development of nano-carbon fertilizer can solve the problems of fertilizer utilization and environmental protection, it is of great significance to achieve zero growth of fertilizer application and green sustainable development of agriculture.
  • the present disclosure discloses a device for preparing nano-carbon urea.
  • a device for preparing nano-carbon urea comprising:
  • the urea inlet pipe 1 is connected to the conical nozzle 2 above the urea granulation tower, install the spray device 8 under the natural ventilation window of the urea granulation tower, the spray device 8 is connected to the atomizing nozzle 4 through the spray manifold 7 , the spray manifold 7 is connected to the atomizing nozzle, they are all located inner the urea granulation tower 5 above the urea rotary sweep 9 , urea discharge funnel is set on the bottom of urea granulation tower; urea discharge funnel is connected to the drum drying device, an atomizer is arranged between the drum drying device and the urea discharge funnel.
  • the starting point of spray device is more than 20 meters above the height of urea granulation tower.
  • the utility model atomizes nano carbon sol, inject to urea directly to form nano-carbon urea, it directly falls to the urea discharge funnel on the bottom of the tower.
  • nano-carbon urea is sprayed with nanocarbon atomizing sol again, it flows reversely with the blowing in hot air to evaporate water, and finally into conveyor belt and packaging.
  • This utility model comprises two stages which combines tower internal, external spray absorption and drying, the content of urea nano-carbon is increased.
  • FIG. 1 is the schematic diagram of the invention.
  • a method for preparing nano-carbon urea from urea granulation tower using nano-carbon sol comprising:
  • Step 1 atomize 0.57%-2% nano-carbon sol through compressed air and liquid pump or atomizing device and it is sprayed on a 70-80 urea surface, the spray amount is 1-5% of fertilizer weight.
  • Step 2 install the spray device under the natural ventilation window of the urea granulation tower, the nano-carbon sol was atomized under 4-7 mpa using a spray device, the starting point of the spray device is more than 20 meters above the height of the feeder on the bottom of the tower, the exit temperature of urea is 120-135° C., the temperature drops to 70-80 when urea drops to 30-50 meters from the bottom to contact with the nano-carbon sol, the flow atomized sol communicate with the hot urea particles under the help of rising gas, the spray is 10 meters high, allowing the nano-carbon sol to penetrate into the interior of urea particles.
  • the stable dispersity of the nano-carbon sol and its pH value is between 1 and 3, it can be evenly distributed on the surface of urea and absorb volatile ammonia gas, the negative potential can permeate into the crystal of urea to produce stable gray-black urea particles containing nano-carbon.
  • Step 3 at the same time, the heat of crystallization is generated during the process of urea crystallization and used to evaporate the water to lower the temperature to 55-60° C.
  • Step 4 connect and feed into drum drying device, the nanocarbon containing urea was sprayed with nano-carbon sol again, spraying mount is 1%-5% of the fertilizer weight, it flow reversely to the hot air blows in at 70° C. to evaporate the water. Finally it enter into conveyor and packing.
  • the nano-carbon sol produced by the invention shows good dispersion and stability in liquid, it will not produce precipitation after using for more than 3 years, as a fertilizer, additive stability and dispersibility is very important.
  • the nano-carbon sol produced by the invention produces the electric conductivity under the nanometer scale, the conductivity is 800-3600 ⁇ s/cm, it blends well with urea.
  • the nano-carbon sol produced by the invention shows good adsorption ability, pH is 1-3, potential is ⁇ 15-35 mV, It is easy to combine with unstable NH 4 in the process of urea granulation to produce stable urea.
  • the nano-carbon sol produced by the invention fully conforms to the definition of the internationally recognized standardization organization.
  • the particle size of nano-carbon is under 100 nm and it is controlled from 98-100% (detected by Malvern laser particle size meter), the mass of nano-carbon basis is 0.57-2%.
  • the key factor to increase urea utilization is the use of good inhibitors, at present, the inhibitors in the market are fine chemical products, which are low in variety and high in price, some of them are toxic such as cyanokun, formaldehyde and chlorine-6 methylpyrimethamine, etc.
  • the nano-carbon sol produced by our company is non-toxic, after detecting by national fertilizer supervision, inspection and testing center (Shanghai) based on the national standard for stable fertilizer testing, the nitrification inhibition rate of nano-carbon sol was 6%-25%, see annex 1 for details. It is a good synergistic material for the preparation of stable urea.
  • nano-carbon sol is broad-spectrum and highly adaptable, suitable for field crops such as corn, rice and cash crops such as tobacco, vegetables and fruit trees, it showed good effect of increasing yield, under the same conditions, reduce the amount of fertilizer use by 10% does not affect yield and has the effect of improving the quality of agricultural products.
  • Nano-carbon urea is provided by the invention containing 46% nitrogen, and the amount of nano-carbon sol added is 10% of fertilizer weight, color: grey.
  • nano-carbon is very effective in increasing nitrogen utilization rate and reducing nitrogen and fertilizer use which is of great significance for improving yield and quality, reducing input of agricultural chemicals and reducing pressure of environmental pollution, it is satisfied with the national 13th five-year development strategy of zero growth of fertilizers and pesticides.
  • Nano urea 46-0-0
  • calcium superphosphate (0-43-0)
  • potassium sulfate (0-0-0-50)
  • nano carbon sol content 0.57% solute, added amount is 10% of urea weight.
  • nano-carbon can improve fertilizer efficiency and the utilization rate of fertilizer significantly.
  • nano-carbon urea increase the production obviously, it increases the yield by 20%; when nitrogen is reduced by 10%, the yield is basically the same as conventional fertilization with slightly reduced. It shows that nano carbon can improve the utilization rate of fertilizer.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Fertilizers (AREA)
US16/088,812 2016-10-03 2017-09-29 Device for preparing nano-carbon urea Expired - Fee Related US10625229B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201621103988.5 2016-10-03
CN201621103988U 2016-10-03
CN201621103988.5U CN206188676U (zh) 2016-10-03 2016-10-03 一种制备纳米碳尿素的装置
PCT/CN2017/104388 WO2018064958A1 (zh) 2016-10-03 2017-09-29 一种制备纳米碳尿素的装置

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US20190336928A1 US20190336928A1 (en) 2019-11-07
US10625229B2 true US10625229B2 (en) 2020-04-21

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CN (1) CN206188676U (zh)
WO (1) WO2018064958A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN206188676U (zh) * 2016-10-03 2017-05-24 北京奈艾斯新材料科技有限公司 一种制备纳米碳尿素的装置

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533829A (en) * 1965-12-14 1970-10-13 Azote & Prod Chim Process and apparatus for solidifying and granulating a paste
US3819310A (en) * 1971-01-08 1974-06-25 I Mavrovic Apparatus for prilling urea
US4219589A (en) * 1977-06-09 1980-08-26 Compagnie Neerlandaise De L'azote Process for urea granulation
US4353709A (en) * 1979-11-28 1982-10-12 Mitsui Toatsu Chemicals, Incorporated Granulation process
US4370198A (en) * 1980-03-13 1983-01-25 Mta Muszaki Kemiai Kutato Intezet Method and apparatus for the recovery of the solid material content of solutions and/or suspensions as granules in a gas fluidized bed
US4449900A (en) * 1982-07-01 1984-05-22 Lerner Bernard J Prilling
US5514307A (en) * 1992-10-13 1996-05-07 Laroche Industries, Inc. Process for the reducing emissions during prilling of material such as ammonium nitrate
US6125552A (en) * 1998-12-17 2000-10-03 Genencor International, Inc. Side discharge assembly for a fluid bed processing system and method thereof
US20090123665A1 (en) * 2004-12-21 2009-05-14 Yasuhiro Zaima Fluidized Bed Device
CN201346454Y (zh) 2008-12-23 2009-11-18 广东福利龙复合肥有限公司 高塔熔融造粒生产设备
US7838080B2 (en) * 2005-08-10 2010-11-23 Glatt Ingenieurtechnik Gmbh Method for producing urea pellets
US7993595B2 (en) * 2003-05-15 2011-08-09 Glatt Ingenieurtechnik Gmbh Apparatus for depositing fluids in a solids flow of a spouted bed apparatus
CN202876620U (zh) 2012-10-30 2013-04-17 朱创业 尿素造粒塔粉尘节能净化回收装置
US8834142B2 (en) * 2007-10-30 2014-09-16 Toyo Engineering Corporation Fluidized bed granulator
US20150166421A1 (en) * 2012-06-18 2015-06-18 Casale Sa Method and Apparatus for the Granulation of a Liquid, in Particular for the Granulation of Urea
CN104822448A (zh) 2012-10-15 2015-08-05 塞彭公司 具体用于生产尿素的造粒塔和造粒方法
CN205152092U (zh) 2015-11-26 2016-04-13 新疆心连心能源化工有限公司 一种尿素造粒塔
CN206188676U (zh) 2016-10-03 2017-05-24 北京奈艾斯新材料科技有限公司 一种制备纳米碳尿素的装置

Patent Citations (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3533829A (en) * 1965-12-14 1970-10-13 Azote & Prod Chim Process and apparatus for solidifying and granulating a paste
US3819310A (en) * 1971-01-08 1974-06-25 I Mavrovic Apparatus for prilling urea
US4219589A (en) * 1977-06-09 1980-08-26 Compagnie Neerlandaise De L'azote Process for urea granulation
US4353709A (en) * 1979-11-28 1982-10-12 Mitsui Toatsu Chemicals, Incorporated Granulation process
US4370198A (en) * 1980-03-13 1983-01-25 Mta Muszaki Kemiai Kutato Intezet Method and apparatus for the recovery of the solid material content of solutions and/or suspensions as granules in a gas fluidized bed
US4449900A (en) * 1982-07-01 1984-05-22 Lerner Bernard J Prilling
US5514307A (en) * 1992-10-13 1996-05-07 Laroche Industries, Inc. Process for the reducing emissions during prilling of material such as ammonium nitrate
US6125552A (en) * 1998-12-17 2000-10-03 Genencor International, Inc. Side discharge assembly for a fluid bed processing system and method thereof
US7993595B2 (en) * 2003-05-15 2011-08-09 Glatt Ingenieurtechnik Gmbh Apparatus for depositing fluids in a solids flow of a spouted bed apparatus
US20090123665A1 (en) * 2004-12-21 2009-05-14 Yasuhiro Zaima Fluidized Bed Device
US7838080B2 (en) * 2005-08-10 2010-11-23 Glatt Ingenieurtechnik Gmbh Method for producing urea pellets
US8834142B2 (en) * 2007-10-30 2014-09-16 Toyo Engineering Corporation Fluidized bed granulator
CN201346454Y (zh) 2008-12-23 2009-11-18 广东福利龙复合肥有限公司 高塔熔融造粒生产设备
US20150166421A1 (en) * 2012-06-18 2015-06-18 Casale Sa Method and Apparatus for the Granulation of a Liquid, in Particular for the Granulation of Urea
US9403733B2 (en) * 2012-06-18 2016-08-02 Casale Sa Method for the granulation of urea
CN104822448A (zh) 2012-10-15 2015-08-05 塞彭公司 具体用于生产尿素的造粒塔和造粒方法
CN202876620U (zh) 2012-10-30 2013-04-17 朱创业 尿素造粒塔粉尘节能净化回收装置
CN205152092U (zh) 2015-11-26 2016-04-13 新疆心连心能源化工有限公司 一种尿素造粒塔
CN206188676U (zh) 2016-10-03 2017-05-24 北京奈艾斯新材料科技有限公司 一种制备纳米碳尿素的装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
The International Search Report of corresponding International PCT Application No. PCT/CN2017/104388, dated Jan. 2, 2018.

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CN206188676U (zh) 2017-05-24
US20190336928A1 (en) 2019-11-07

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